Sorry for the how off topic something of (+) (0) subject is closed
Old Thread I like to read about a Early Horse.
This will Help for consistent pace line selection.

FTL Own words:

(+) = any race where the horse ran, 1st, 2nd or 3rd
(+) = any race where the horse shows one of the following
A – showed good early form by being 1st or 2nd at the first and/or 2nd calls, even if it faded down the stretch
B – any race where the horse made a good middle move (that’s call 1 to call 2) gaining in lengths and being within 2 lengths of the leader at the second call, even if it faded down the stretch
0 = any other line

The best definition I can offer for a “usable” line is;
“any line where the horse shows it had an impact on the outcome of the race”
The most important words here are “had an impact on the outcome of the race”.
Obviously a horse that finished 1st,2nd or 3rd had an impact on the outcome of the race and was trying to win the race
Any horse that is running 1st or 2nd at the first and/or second calls are obviously having an impact on the race, even if they fade down the stretch.
Horses that show they make a good middle move, as noted above, are impacting the race at the second call, even if they fade down the stretch. Generally, these types of lines will show the horse moving into 2nd or 3rd position or even taking the lead at the second call and then fading down the stretch.